The engine control unit of any of the Chrysler models, specifically the Chrysler 300 and LHS is also known as the Chrysler PCM and has the function of controlling a variety of actuators that will provide high performance levels to an internal combustion engine. It relies completely on various sensors for the transmission of the data, the value of which is generally translated by the multi-dimensional maps. The information inherited are then utilized by these actuators into the control of the vehicle’s performance at any given time.
Combined with these other essential electronic devices, the engine control unit is one of the determining factors when related to the fuel consumption; which is a primary concern nowadays in vehicle running costs. This has been a critical and innovative development in the sphere of motoring. Prevailing road conditions influence the ability of a driver regarding its obtaining the best economy from a vehicle. It is therefore, a situation that is reliant on the inherent capabilities of the vehicle performance. The controlling unit has the capacity of calculating the load of an engine at an operating RPM. It will make a decision as to allowing a valve to open early or late and to what degree, to best meet driving conditions.
It is a normal situation for any motorist to seek the utmost performance from their vehicle, especially in the present day when related to driving economy, but aggravated by a need for increased usage. Before the ECU was introduced to the motoring world; it was considered normal, for mechanics manually to set the air-fuel mixture, ignition timing and the idling speed of a vehicle. These functions were controlled by pneumatic and mechanical methods. The control device or Chrysler 300 ECM is designed to ensure the most advantageous running of the engine. This is contributed to by the degree of depression on the throttle, combined with data received from the mass-flow sensor, which indicates the quantity of air input to the engine. With the added input from the engine coolant temperature sensor, the collected data is then used to determine the quantity of fuel required to be injected at any operating stage.
The Chrysler ECM has the capability of adjusting the precision timing of the spark, which increases power and improves the fuel economy. It has the ability of detecting the knocking in the engine and the signs of retarded performance, so that the delayed time can be compensated. Such symptoms or signals are generally found when the engine performs at lower revolutions. Accordingly, the ECU helps in transmitting the directions to the Transmission Control Module, in order to effect the down shift in the gearing. The controlling devices hence performs the function of regulating the idling speed of the engine.
A sensor that determines the position of the crankshaft is utilized to assess the RPM of the engine. It is an influencing factor regarding engine timing functions for fuel injections, timing of the valve and spark. The Chrysler 300 ECM is also valuable in the controlling of the intake and exhaust valves, providing the advantage of starting an engine without the need of a starter motor.